Defects induced magnetic transition in Co doped ZnS thin films: Effects of swift heavy ion irradiations

被引：37

作者：

Patel, Shiv P. ^{[1
]}

Pivin, J. C. ^{[2
]}

Patel, M. K. ^{[3
]}

Won, Jonghan ^{[3
]}

Chandra, Ramesh ^{[4
]}

Kanjilal, D. ^{[5
]}

Kumar, Lokendra ^{[1
]}

机构：

[1] Univ Allahabad, Dept Phys, Allahabad 211002, Uttar Pradesh, India

[2] CNRS, IN2P3, CSNSM, F-91405 Orsay, France

[3] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA

[4] Indian Inst Technol, IIC, Nanosci Lab, Roorkee 247667, Uttar Pradesh, India

[5] Inter Univ Accelerator Ctr, New Delhi 110067, India

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2012年 / 324卷 / 13期

关键词：

DMS; SHI irradiation; SQUID; Ion track; Defect; ROOM-TEMPERATURE FERROMAGNETISM; ELECTRICAL-TRANSPORT; TRANSFORMATION; DEPOSITION; TIO2;

D O I：

10.1016/j.jmmm.2012.02.031

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of swift heavy ions (SHI) on magnetic ordering in ZnS thin films with Co ions substituted on Zn sites is investigated. The materials have been synthesized by pulsed laser deposition on substrates held at 600 degrees C for obtaining films with wurtzite crystal structure and it showed ferromagnetic ordering up to room temperature with a paramagnetic component. 120 MeV Ag ions have been used at different fluences of 1 x 10(11) ions/cm(2) and 1 x 10(12) ions/cm(2) for SHI induced modifications. The long range correlation between paramagnetic spins on Co ions was destroyed by irradiation and the material became purely paramagnetic. The effect is ascribed to the formation of cylindrical ion tracks due to the thermal spikes resulting from electron-phonon coupling. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：2136 / 2141

页数：6

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